| Imagereel Limited | Information & communication | 2006 |
| Imaginative Skills CIC | Education | 2025 |
| Imah Consortium Limited | Real estate | 2017 |
| Imaje Recruitment Ltd | Administrative & support | 2021 |
| Imalik Holdings Limited | Financial services | 2026 |
| Imariq Limited | Water & waste | 2016 |
| Imas Consulting Limited | Construction | 2016 |
| Imax Studio.Uk Ltd | Professional & scientific | 2021 |
| Imaz Traders Limited | Wholesale & retail | 2025 |
| Imeson Consulting Ltd | Information & communication | 2025 |
| Imet Healthcare Ltd | Health & social care | 2012 |
| Imhh Properties Ltd | Real estate | 2026 |
| IMM Services Yorkshire Limited | Other services | 2025 |
| Immaculate Detailing Limited | Administrative & support | 2023 |
| Immersive Works Limited | Administrative & support | 2024 |
| Immortal Care Limited | Health & social care | 2014 |
| Immy's BD4 Ltd | Hospitality | 2026 |
| Immy's Spice Ranch Ltd | Hospitality | 2022 |
| Immys Services Ltd | Transport & logistics | 2026 |
| Imomza Ltd | Other services | 2024 |
| IMP Holdings Limited | Real estate | 2023 |
| Impact Auto Clinic Ltd | Wholesale & retail | 2025 |
| Impact Building and Joinery Services Limited | Construction | 2005 |
| Impact Foster Care Ltd | Health & social care | 2024 |
| Impact Gamers C.I.C. | Education | 2016 |
| Impact Hub Yorkshire CIC | Administrative & support | 2017 |
| Impact Paving Limited | Construction | 2021 |
| Impact Property Services Limited | Hospitality | 2005 |
| Impact Women Network CIC | Education | 2024 |
| Impeccable Solution Service Ltd | Administrative & support | 2015 |
| Impelion Solutions Ltd | Information & communication | 2024 |
| Imperial Harvests Ltd | Wholesale & retail | 2025 |
| Imperial Luxury Projects Ltd | Construction | 2025 |
| Imperial Motor House Ltd | Wholesale & retail | 2026 |
| Imperiale Ltd | Wholesale & retail | 2020 |
| Imperium Distribution Limited | Wholesale & retail | 2025 |
| Importcars Limited | Wholesale & retail | 2018 |
| Impossible Problems Solved Limited | Financial services | 2023 |
| Impressions Gallery of Photography Limited | Arts & recreation | 1974 |
| Impulse Direct Ltd | Transport & logistics | 1994 |
| Impulse Products Ltd | Manufacturing | 2018 |
| Impulse Traders Limited | Wholesale & retail | 2017 |
| IMR Fencing & Landscaping Limited | Administrative & support | 2021 |
| Imran Ashraf Healthcare Ltd | Health & social care | 2022 |
| Imran Khan Consulting Limited | Administrative & support | 2019 |
| Imran Mayat Ltd | Information & communication | 2014 |
| Imran Reporting Ltd | Health & social care | 2025 |
| Imran Studio Ltd | Information & communication | 2026 |
| IMS Certification UK Ltd | Professional & scientific | 2022 |
| IMT Global Trade Ltd | Wholesale & retail | 2026 |
| Imtiaz Property Management Ltd | Households | 2026 |
| Imura Aesthetics Ltd | Other services | 2026 |
| IN and Outbound Ltd | Professional & scientific | 2022 |
| IN Consulting Limited | Professional & scientific | 2025 |
| IN Equity Limited | Wholesale & retail | 2025 |
| IN House Securities Limited | Construction | 2005 |
| IN Loving Memory Memorials Ltd | Manufacturing | 2025 |
| In-Car Emporium Ltd. | Wholesale & retail | 2011 |
| In-Site Control Limited | Professional & scientific | 2000 |
| In-Sync Barbers Ltd | Other services | 2023 |
| In-Tuition Academy Group Ltd | Education | 2023 |
| INA Healthcare Consultancy Ltd. | Health & social care | 2018 |
| Inception LAB Limited | Professional & scientific | 2025 |
| Inclusive Matrix Ltd CIC | Professional & scientific | 2023 |
| Incognito by KJW Ltd | Administrative & support | 2025 |
| Incosoft Ltd | Information & communication | 2026 |
| Incredible Bulk Self Storage Limited | Administrative & support | 2014 |
| Incredible Vapes Ltd | Wholesale & retail | 2017 |
| INCUB8 Limited | Professional & scientific | 2026 |
| Incunabula Limited | Information & communication | 1991 |
| IND Properties Ltd | Construction | 2007 |
| Independent Auto Salvage Limited | Wholesale & retail | 2024 |
| Independent Medical Agency Limited | Professional & scientific | 2024 |
| Independent Transport Services Ltd | Transport & logistics | 2025 |
| Independent VWG Specialist Ltd | Wholesale & retail | 2023 |
| India Calling Productions Limited | Information & communication | 2015 |
| India Gate Kitchen Limited | Hospitality | 2026 |
| Indie Kids Clothing UK Ltd | Wholesale & retail | 2018 |
| Indigo Dental Holdings Limited | Health & social care | 2016 |
| Indigo Dental Limited | Health & social care | 2013 |
| Indigo Haul Ltd | Other services | 2024 |
| Indus Bargains Ltd | Wholesale & retail | 2024 |
| Industerior Limited | Manufacturing | 2022 |
| Industrefy Ltd | Wholesale & retail | 2021 |
| Industrial Blades (Sheffield) Limited | Professional & scientific | 1972 |
| Industrial Disease Claims (UK) Limited | Professional & scientific | 2005 |
| Industrial Spray Equipment Limited | Wholesale & retail | 1999 |
| Industry Training for Skills Ltd | Education | 2020 |
| Ineedrecruitment Ltd | Administrative & support | 2023 |
| Infini Rooms Limited | Wholesale & retail | 2020 |
| Infinico Ltd | Arts & recreation | 2023 |
| Infinis Nexus Ltd | Wholesale & retail | 2025 |
| Infinit Yorkshire Ltd | Wholesale & retail | 2025 |
| Infinite Capital Corporation Limited | Real estate | 2022 |
| Infinite Media Ltd | Professional & scientific | 2017 |
| Infinite Vapour Limited | Administrative & support | 2013 |
| Infiniti Building Services Ltd | Construction | 2023 |
| Infiniti Computers Ltd | Information & communication | 2010 |
| Infinity Automobiles Limited | Wholesale & retail | 2024 |
| Infinity Capital & Investments Limited | Real estate | 2019 |